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roboswitch: Check some read operation results

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This gets rid of some static analyzer warnings about uninitialized
variables being used in comparisons or write operations.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2019-03-09 18:56:48 +02:00
parent 9571f945c6
commit ca9efe113c
1 changed files with 22 additions and 14 deletions
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36
src/drivers/driver_roboswitch.c
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@ -290,21 +290,26 @@ static int wpa_driver_roboswitch_leave(struct wpa_driver_roboswitch_data *drv,
wpa_driver_roboswitch_addr_be16(addr, addr_be16);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_CONF,
&_read, 1);
if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_CONF, &_read, 1) < 0)
return -1;
/* If ARL control is disabled, there is nothing to leave. */
if (!(_read & (1 << 4))) return -1;
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_1, addr_read, 3);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_VEC_1,
&ports_read, 1);
if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_1, addr_read, 3) < 0 ||
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_1, &ports_read, 1) < 0)
return -1;
/* check if we occupy multiport address 1 */
if (os_memcmp(addr_read, addr_be16, 6) == 0 && ports_read == ports) {
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_2, addr_read, 3);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_2, &ports_read, 1);
if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_2, addr_read,
3) < 0 ||
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_2, &ports_read,
1) < 0)
return -1;
/* and multiport address 2 */
if (os_memcmp(addr_read, addr_be16, 6) == 0 &&
ports_read == ports) {
@ -327,10 +332,13 @@ static int wpa_driver_roboswitch_leave(struct wpa_driver_roboswitch_data *drv,
&ports_read, 1);
}
} else {
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_2, addr_read, 3);
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_2, &ports_read, 1);
if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_ADDR_2, addr_read,
3) < 0 ||
wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
ROBO_ARLCTRL_VEC_2, &ports_read,
1) < 0)
return -1;
/* or multiport address 2 */
if (os_memcmp(addr_read, addr_be16, 6) == 0 &&
ports_read == ports) {